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<html>
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		<title>git 练习</title>
		<style type="text/css">
			*{
				padding: 0;
				margin: 0;				
			}
			h1{
				height: 200px;
				background: #f00;
				font-size: 40px;
				color: white;
				line-height: 200px;
				text-align: center;
			}
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		<h1>git 练习</h1>
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